Boiling water is one of the most common kitchen tasks, whether you’re making tea, coffee, or preparing meals. Many people wonder whether it is cheaper to boil water using an electric kettle or a stove.
In this guide we compare the electricity usage of kettles and electric stoves.
How Much Electricity Does a Kettle Use?
Most kettles use 1800W to 2200W and boil water very quickly.
Example:
Appliance
Power
Time
Kettle
2000W
3 minutes
Energy used:
≈ 0.1 kWh
Cost:
≈ R0.30
How Much Electricity Does an Electric Stove Use?
Electric stove plates typically use 1500W to 2500W.
However, they often take longer to heat water.
Example:
Appliance
Power
Time
Electric stove
2000W
8 minutes
Energy used:
≈ 0.27 kWh
Cost:
≈ R0.80
Electricity Cost Comparison
Method
Cost per Use
Electric kettle
~R0.30
Electric stove
~R0.80
In most cases, boiling water with a kettle is cheaper and faster.
Why Kettles Are More Efficient
Electric kettles are designed specifically to boil water quickly and efficiently. Most kettles heat water directly, while stoves lose some heat to the surrounding air.
Because of this, kettles usually use less electricity overall.
Final Verdict
For boiling water, electric kettles are usually cheaper and faster than electric stoves.
Most households will save both time and electricity by using a kettle rather than heating water on a stove.
Electric kettles and microwaves are two of the most commonly used kitchen appliances in South African homes. Both are used to heat water or food quickly, but many people wonder which appliance uses less electricity.
With rising electricity prices and frequent loadshedding, understanding appliance energy usage has become increasingly important.
In this guide we compare the electricity usage of kettles and microwaves to see which appliance is cheaper to run.
How Much Electricity Does a Kettle Use?
Most electric kettles use between 1800 W and 2200 W of power.
Because kettles heat water very quickly, they usually run for only 2 to 4 minutes.
Example:
Appliance
Power
Average Time
Electric kettle
2000W
3 minutes
Energy used:
2000W × 3 minutes ≈ 0.1 kWh
If electricity costs about R3.00 per kWh, the cost per boil is roughly:
≈ R0.30
This means boiling a kettle once typically costs around 30 cents.
You can read more in our guide on how much electricity a kettle uses in South Africa.
How Much Electricity Does a Microwave Use?
Microwaves generally use 800 W to 1200 W depending on the model.
However, microwaves often run longer when heating water or food.
Example:
Appliance
Power
Average Time
Microwave
1000W
4 minutes
Energy used:
1000W × 4 minutes ≈ 0.07 kWh
Cost per use:
≈ R0.20
So microwaves usually cost around 20 cents per use.
Electricity Cost Comparison
Appliance
Power
Typical Cost per Use
Kettle
1800–2200W
~R0.30
Microwave
800–1200W
~R0.20
While kettles use more power, they also boil water very quickly.
In most cases, the difference in cost between the two appliances is very small.
Which Appliance Is More Efficient?
For boiling water specifically, kettles are usually more efficient because they are designed for that purpose.
Microwaves can heat water, but they often take longer and may heat unevenly.
For reheating food, however, microwaves are usually the better option.
Kettle vs Microwave: Which Should You Use?
Use a kettle when you want to:
boil water for tea or coffee
cook instant meals
heat water quickly
Use a microwave when you want to:
reheat food
defrost meals
cook quick microwave dishes
Both appliances are relatively inexpensive to run compared to larger kitchen appliances.
Final Verdict
Both kettles and microwaves use relatively small amounts of electricity in everyday use.
Kettles typically cost around 30 cents per boil, while microwaves cost around 20 cents per use depending on cooking time and wattage.
Because both appliances operate for short periods, the difference in electricity cost is usually minimal.
Choosing the right appliance mainly depends on what you want to heat rather than electricity cost.
Explore More Appliance Electricity Guides
If you’re interested in understanding how other appliances affect your electricity bill, you may also find these guides helpful:
Electric kettles are one of the most commonly used appliances in South African homes. Whether you’re making tea, coffee, or preparing food, kettles are used multiple times a day in many households.
With electricity prices continuing to rise, many people are wondering how much power a kettle actually uses and how much it costs to boil water.
In this guide we explain kettle electricity usage, typical power consumption, and how much it costs to run a kettle in South Africa.
How Much Power Does a Kettle Use?
Most electric kettles use between 1800W and 2200W of power.
This means they consume electricity quickly, but they also boil water very fast.
Typical kettle wattage:
Kettle Type
Power Usage
Small kettle
1500W
Standard kettle
2000W
Large kettle
2200W
Because kettles only run for a few minutes, the total electricity cost is usually lower than people expect.
Electricity Cost to Boil Water
To estimate the cost, we can use an example.
Example:
Kettle power: 2000W
Boiling time: 3 minutes
Energy used:
2000W × 3 minutes ≈ 0.1 kWh
If electricity costs around R3.00 per kWh, the cost per boil is approximately:
R0.30
So boiling a kettle once usually costs around 30 cents.
Monthly Electricity Cost of a Kettle
If you boil your kettle 5 times per day:
Daily cost:
R0.30 × 5 = R1.50
Monthly cost:
R1.50 × 30 ≈ R45
This means a kettle typically costs between R30 and R60 per month, depending on usage.
Kettle vs Other Kitchen Appliances
Appliance
Power Usage
Kettle
1800–2200W
Air fryer
1500–2000W
Microwave
800–1200W
Electric oven
2000–3000W
Even though kettles use high wattage, they run for a very short time.
Tips to Reduce Kettle Electricity Usage
You can reduce electricity costs by:
boiling only the amount of water you need
avoiding repeated boiling
using efficient modern kettles
These small habits can reduce electricity consumption over time.
Final Verdict
Electric kettles use a relatively high amount of power, but because they operate for only a few minutes at a time, the overall electricity cost is usually low.
For most households in South Africa, using a kettle several times a day will typically cost between R30 and R60 per month.
Understanding appliance electricity usage can help households manage energy consumption and reduce electricity costs.
Learn More About Appliance Electricity Usage
If you’re interested in understanding how other appliances affect your electricity bill, you may also find these guides helpful:
